Andrew lamberton



(No ModelJ- A. LAMBER-TON.

GRINDING MILL! No. 406,355. 7 Patented July 2, 18,89.

UNITED V STATES PATENT OFFICE.

ANDREW LAMBERTON, or OOATBRIDGE, COUNTY OF LANARK, SCOTLAND.

GRINDING-MILL.

SPECIFICATION forming part of Letters Patent No. 406,355, dated July 2, 1889.

Application filed July 23, 1888. Serial No. 280,783. (No model.) Patented in England November 30, 1887, No. 16,451.

To all whom it may concern.-

Be it known that I, ANDREW LAMBERTON, a citizen of the United Kingdom of Great Britain and Ireland, residing at Coatbridge, in the county of Lanark, Scotland, have invented new and useful Improvements in Grinding- Mills, (which have not been patented in any country, except Great Britain by Letters Patentdated the 30th day of November, 1887, No. 16,451,) and I do hereby declare that the following is a full, clear, and exact description of the invention, which will enable others skilled in the art or manufacture to which it relates to make and use the same.

My invention, which relates to improvements in machinery for grinding or pulverizing substances either in a dry or wet state,

has for its object to effect these operations by means of balls, cylinders, cones, or the like bodies, which are rotated or driven in a horizontal or inclined circular path constituting the grinding or pulverizing chamber by the frictional Contact of a driver whose weight upon the balls, cylinders, or cones increases the grinding or pulverizing effect.

My invention consists in novel features of construction hereinafter described, and pointed out in the claim.

In order that my invention may be fully understood, I will proceed to describe it with reference to the accompanying drawing,which is a vertical section of the machine, which consists of acircular casing A, the bottom A of which is inclined upward toward the circumference and has fitted into it abed B, of metal, which maybe in one piece or composed of a series of segments constituting a circle. In the upper surface of the bed B a concave circular path 0 is formed, the said path constituting the grinding-surface, the balls X, or the cylinders or cones used as their equivalents, and of which any desired number may be employed, resting on the said surfaces.

From the inner side of the bed B the bottom of the casing A inclines upward toward the center, so as to constitute a cone A ,i1nmediately above which there is situated a hollow shaft D, the latter having a square, octagonahor other an gularly-shaped lower end D, passing loosely through the driver H, the material to be ground or pulverized being fed either in a wet or dry state through thehollow shaft from a hopper F at the top of the machine.

The driver, which rests upon the balls X, is composed of two parts-namely, a renewable face-plate E, which has a circular, hollow, or concave path bearing on. the balls, cylinders, or cones, and a backing-block H, the said faceplate being secured by bolts G to the backing-block, between the lower part of which and also between the inner edge of the faceplate E and the conical bottom of the casing A an annular space I for the downflow of the material to be ground is left.

The shaft D, which passes up through a sleeve J on the top A of the casing A, has a bevel gear-wheel K secured upon it, the said wheel being geared with a bevel-pinion L, fired on a horizontal shaft M, also carried in bearings on the top of the casing,and on whose outer end fast and loose pulleys N N for a driving-belt are situated.

The shaft D and its appurtenances are so connected as to provide for rise and fall in the driver H E, caused by inequalities in feeding or in the size of the materials being ground.

The hopper F is centered on a bracket 0 secured to the top of the casing A, and it is furnished with an inclined spout P, the rate of feeding being regulated faster or slower by lowering or raising the delivery end of the spout, for which purpose a hand-wheel a and screw b are provided, as shown.

The material to be ground or pulverized passes in between the ballsX or their equivalent cylinders or cones and the bearing-surfaces of the bed B and the disk or face-plate E, and by the rotation of the balls, cylinders, or cones it is reduced to any desired degree of fineness and thereafter passes out of the grinding or pulverizing chamber A through a discharge opening or branch R; or, instead of such branch, the body of the casing or a part of it may consist of a screen which will retain the material until it is fine enough to pass through the meshes. WVith either arrangement,to force or blow the ground or pulverized material out of the casing A, a series of fanblades S are fitted around the driver H, as indicated, or a fan or exhauster may be applied to the discharge opening or branch R.

Having now described my invention, what I desire to claim and secure by Letters Patent 1s In a grinding-mill, the combination of a eas- 5 ingA, having a bottom A, inclined toward the circumference of the casing, a cone A extending" upward from the inner side of the bottom, and a top A the bed B, having concave circular path 0, the balls X, working in the path,

10 the loose driver H, havingfaoe-plate E, resting on the balls, and formed with a central eye and an annular passage I around the cone, the sleeve J, surmonnting the top of the casing, the hollow shaft D, turning in the sleeve, hav- 15 in an angular lower end D, fitting loosely in the eye of the driver, to enable the latter to wabble around with it, and driving" mechanism connected with the hollow shaft, substantially as described.

In witness whereof I, the said ANDREW 2o LAMBERTON, have hereunto setmy hand and seal. this 28th day of May, 1888. v

ANDRE LAMBERTON. [L. s]

Witnesses:

GEo. M. CRUIKSHANK, Fel. Inst. Patent Agents, 62 St. Vincenl St,

Glasgow.

JOHN ARMSTRONG, Clerk, 62 Saint l incenf Street, Glasgow. 

